its cornrows ...a traditional style of hair grooming of African origin where the hair is tightly braided very close to the scalp, using an underhand, upward motion to produce a continuous, raised row. Cornrows can be formed, as the name implies, in simple, straight lines; or, in complicated geometric or curvilinear designs. Often favored for their easy maintenance, cornrows can be left in for weeks at a time simply by carefully washing the hair using a stocking cap or hair net and then regularly oiling the scalp and hair. Cornrowed hairstyles are often adorned with beads or cowry shells, in the African tradition. Depending on the region of the world, cornrows can be worn by either men or women.

A braid is a unit of measurement that can be applied to many different things. Its origin comes from the saying "hair" ex. (move that just a hair this way) This is just a new way to say this. You can also use any other hair style in place of braid ex. Tail, bun, rat tail, updo, messy bun exc.

I'll see you in a Braid man.
Catch you in a Braid.
I havent seen that dude in a Braid!